JV 90 Data cards

[stewrat]

I have an ancient JV 90. I need to back up my expansion boards occasionally to change the batteries. Can anyone advise what sort of cards they are and where I might get them from. Thanks

[rcraven]

I could be mistaken, but I couldn't find any reference to a battery in the expansion card.
If you are talking about the Data card, you can dump all the data using MidiOx or most DAWs. (bottom of page 96 in the manual along with all the User data in the synth)
Pull the card out and change the coin battery then put it in and reload the data.

All the best
Royce

[stewrat]

Not finding the battery change in the manual was my problem. I am 72 years old and more used to the piano and last time I found it was too late and I had to take it to a very expensive repairer who was unable to get me the cards. I only use it very occasionally so don't want to keep doing that. Thanks rcraven.